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Nonequilibrium interactions between two quantum circuits | | V.S. Khrapai
; S. Ludwig
; J.P. Kotthaus
; H.P. Tranitz
; W. Wegscheider
; | | Date: |
6 May 2008 | | Abstract: | We briefly overview our recent results on nonequilibrium interactions between
neighboring electrically isolated nanostructures. One of the nanostructures is
represented by an externally biased quantum point contact (drive-QPC), which is
used to supply energy quanta to the second nanostructure (detector). Absorption
of these nonequilibrium quanta of energy generates a dc-current in the
detector, or changes its differential conductance. We present results for a
double quantum dot, a single quantum dot or a second QPC placed in the detector
circuit. In all three cases a detection of quanta with energies up to ~1 meV is
possible for bias voltages across the drive-QPC in the mV range. The results
are qualitatively consistent with an energy transfer mechanism based on
nonequilibrium acoustic phonons. | | Source: | arXiv, 0805.0724 | | Services: | Forum | Review | PDF | Favorites | |
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